Exhaust-steam injector



Dec. 27, 1927.

L. FRIEDMANN ET AL EXHAUST s'rmm INJECTOR Filed May 4.. 1926 Fig 2 1/.Danube 1 mvcmar's W lk r m Patented Dec. 27, 1927.

UNITED STATES 1,553,954 PATENT oFFlcE.

LOUIS FRIEDMANN AND HANS DETJ'TSCH, F VIENNA, AUSTRIA.

nxnausr-srnam manc'ron.

Application filed May 4, 1926, Serial No. 106,727, and in Austria May14, 1925.

This invention relates to exhaust steam injectors provided with aplurality of steam cones and the necessary number of other cones such aswater, collecting and delivery cones in which exhaust steam is admittedto one of the steam cones simultaneously with the admission of livesteam to another steam cone. If no exhaust steam is available live steamof reduced pressure is fed to the exlq haust'steam cone as a substitute.

In injectors of this kind the quantity of water fed to the water conedepends solely upon the pressure of the exhaust steam used and thetemperature of the water fed. Now

l5 infsome cases it is desirable to increase the quantity of water. fedtoth'e water cone, which is not possible under the above statedconditions without loweringthe temperature of the feed water as theexhaust steam pressure can not be varied atwill,

' j This invention therefore consists in improvements'in exhaust steaminjectors of the kind mentioned allowing to increase the quantities ofwater flowing to the water 2 cone without variation of the exhaust steampressure or the temperature of the feed water. i i

According to this invention an arrangement is provided by means of whichthe in flow of water to the water cone and the inflow of exhaust steamfrom the exhaust steam chamber to the exhaust cone are controlledsimultaneously. This inflow control consists in providing alongitudinally dis-- placeable exhauststeam cone in thecircumferential'surface of which channels leading to the interior of thecone are provided, which are more or less freed according to the varyingposition of the displaceable cone. Thereby the inflow of exhaust steamto the cone may be regulated in accordance with the inflow of waterdesired.

The invention is illustrated in the accompanying drawing which shows'twodiil'erent modifications of the invention.

Fig. 1 of the drawing shows a longitudinal section through an exhauststeam injector of the usual type in which however a longitudinallydisplaceable exhaust steam cone provided with channels according to theinvention has been substituted for the usual exhaust steam cone.

Fig. 2 shows on a larger scale another modification only the partssurrounding the exhaust steam cone being illustrated as the other partsmay be identical with those representedin Fig. 1.

In both figures the reference 1 denotes the live steam cone of theinjector, 2 the exhaust a steam cone, 3 the water cone; 4 the collecting00 cone and 5 the delivery cone. An exhaust steam chamber 6 is providedat the left side to which exhaust steam'from the engine is admitted andwhich communicates with the exhaust steam cone 2. 7 is the waterchamher, 8 the overflow chamber and 9 the delivcry or pressure chamberof the injector, the relative arrangement and operation of all theseparts being in substance similar or identical with those of'the knowntype of exhaust steam injector. According to this invention however theexhaust steam cone is not as usual integral with the body of theinjector but is made as a separate piece showing an outer cylindricalsurface in serted into a suitable hollow cylindrical surface of theinjectorbody.

The exhaust steam cone is capable of longitudinal displacement withinthe injector casing and may be moved by means of an excentric 10 or anyother appropriate means. The circumferential cylindrical surface isprovided with openings or channels 12 which lead to the interior of thecone and are either covered by the injector casingenclosing theexhauststeam or are establishing a communication between the exhauststeam chamber 6 and the interior of thecone 2. The live steam cone 1 isprovided with a disc like collar 11 arranged at that part of the livesteam cone which projects into the exhaust steam cone and its size is socalculated that the annular space between the collar 11 and the wall ofthe exhaust steam cone is smaller than the smallest cross section of theannular space at any other place of the projecting live steam cone andthe exhaust steam cone. Therefore whatever the position of the exhauststeam cone relatively to the live steam cone may be, the collar 11 willalways exercise a choking or throttling effect upon the exhaust steamflow entering at the admission end of the exhaust steam cone. Iftherefore the quantity of water flowing to the water cone shall beincreased while on the other hand the pressure of the exhaust steamadmitted to the exhaust steam chamber is a constant one and thetemperature of the feed water is not lowered, this increase may beobtained by lit) displacing the exhaust steam cone to the left in thedrawing i. e. towards the a side from whence the steam enters asby thisdisplacement not only the free annular cross section between the exhauststeam cone and the water cone'isincreased butthe quantity of exhauststeam admitted to the exhaust steam cone will also increase as theexhaust steam may i enter not only at the annular cross section betweenthe collar 11 and the Wall of the cone but alsohy means of the aperturesor channels 12 in the circumfer ential part of said cone. A

Fig. 2 shows on an enlarged scale another modification of the abovedescribed construction in which the fact has been taken into accountthat the exhaust steam pressure has increased and that therefore adecrease of the admitted quantity of exhaust steam has to heefiectedsinuiltaneously with an inere'ase otthe water inflow. In thismodification a sepai'ate steam path in'the form of a channel 13 in theinjector casing is provided which establishes *connnunication betweenthe exhaust steamchamber 6 and the interior of; the cone by means notthe apertures or channels 12, when the exhauststeamcone has beenmovedtowards the left or entrance side of the cones toa certain extent. Ifthe displacement of the exhaust steam cone 2 is however furthercontinued the communication between the channel 13 or the small annularchamber 14 into which the channel 13 leads and the aperturesor channels12 is interruptcd because the said apertures or channels 12am againcoveredby the injector casing or'somepartvthereof by which the exhauststeam cone-is enclosed and within whichit is displaced.

We do not limit ourselves to the twoamodifications shown as it isobvious that other modifications embodying the same 'rinciple may bedevised Without departing rontrthe essence of the invention.

What weclaim is a 1. In an exhaust steam injector of the kind specified,a live steam cone, awater cone and an exhaust steam cone provided withchannels leading from the circumference tothe 'haust steamcone, thusmore or less freeing the channels leading to the interior of the saidexhaust steam cone and altering the quantity of exhaust steam admittedthereto in accordancewith the quantity of water ad mitted to the'watercone. a

2. In an exhaust steam injector of the kind specified, a live steamcone, a Water cone and a longitudinally displaceahle exhauststeam cone,channels leading totheinterior of said cone, an injector casingenclosingsaid cone and permitting displacement of the same therein, achannel leading from the exhaust steam chamber through said casing tovallow comn'mnication with the channels in said exhaust steam coneandmeans to dis place said exhaust steam conesoas toestablish and outoft communication with the interior of said cone through saidchannel inthe casing to a varying extent in accordance with the amount ofdisplacement impel to the exhaust steam cone. a

3. In an exhaust steam injector eithe kind specified, an injectorcasing, a live steam; cone, anexhaust steam cone anda water cone, sa1dexhaust steam iconebemg displaceable within said casing, means to varythe admissionof exhaust steam to said cone, comprising an exhaust steampipe, an

exhaust steam chamber communicating theses with and channelswlthinsaidexhaust steam cone, adapted to establish axcommunieationbetween said exhaust steam chamber and interior of the cone and more orless freediln accordance with thevarying location of said exhaust steamcone, to vary the admission of exhaust steam'in accordance with thequantity of water admitted to the water come.

In testimony whereof we allix our sigma tures.

LOUIS FRIEDMAN. HANS DEUTSGH.

